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    <meta charset="utf-8"/>
    <title>Performance tool + cycle collection test page</title>
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    <script type="text/javascript">
    window.test = function () {
      document.body.expando1 = { cycle: document.body };
      SpecialPowers.Cu.forceCC();

      document.body.expando2 = { cycle: document.body };
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      document.body.expando3 = { cycle: document.body };
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    test();
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